11 The relative humidity at the base of a cloud is closest to

100%

12 Telephone was invented by

Graham Bell

13 We know that a shallow sleep is less restful than a deep sleep. But what kind of sleep we are in, when we dream?

Shallow Sleep

14 How does a honeybee communicate to other bees about the discovery of nectar-giving flowers and pollen which can be converted into honey?

Through various kinds of dances

15 If there were no mulberry trees there would be no

Silk

16 Which is the heaviest flying bird?

Bustard

17 Who invented Safety Match?

Landstrom

18 As a body moves from equator to pole, its weight increases by

½ percent

19 Suppose you are standing at the front end of a stationary boat and dive in the lake. In which direction will the boat move?

Backward

20 Reforestation results by an increase in

Water in the ground